We must act on chance when we have the choice.(當我們選擇時就要好好把握這個機會。)

Why didn't you act on her suggestion?(你為什么沒有按照她的建議去做呢？)

And they act on their belief.(并且他們也按這一信念行動起來。)

Why not act on intention, on desire?(為什么不依照意愿和愿望而行動？)

We need to act on a Europe-wide scale.(我們得在全歐洲范圍內采取行動。)

A patient will usually listen to the doctor's advice and act on it.(病人通常會聽從醫生的建議并且按照它行動。)

"It seemed like the perfect chance for natural selection to act on a population," said Dr. Ilardo.(“這似乎是自然選擇在一個群體中發揮作用的完美機會。”伊拉爾多博士說。)

As soon as you gather some information, act on it!(一旦你收集到一些信息，按照信息行事！)

We must not act on assumptions.(我們不能憑想當然辦事。)

So these are the only forces that act on this object.(所以這些是物體上，僅存的作用力。)